package collection;

import java.util.ArrayList;
import java.util.Collection;
import java.util.HashSet;

/*
 * 集合的遍历:
 */
public class CollectionDemo2 {
    public static void main(String[] args) {
        Collection c = new ArrayList();
        //Collection c = new HashSet();
        c.add(new Point(1,2));
        c.add(new Point(3,4));
        c.add(new Point(5,6));
        c.add(new Point(7,8));
        c.add(new Point(9,10));
        boolean b = c.add(new Point(1,2));
        System.out.println(b);//对于HashSet集而言为false，因为是否重复取决于元素的equals()结果
        //对于ArrayList集而言为true，因为ArrayList是可重复集

        System.out.println(c);


        Point p = new Point(1,2);
        boolean contains = c.contains(p);
        System.out.println("是否包含"+p+":"+contains);
        System.out.println(c);

        boolean remove = c.remove(p);
        System.out.println("是否删除"+p+":"+remove);
        System.out.println(c);
    }
}
